Managing crowding stress in salmon aquaculture requires understanding the complex physiological and behavioral responses to high stocking density.
Salmon crowding stress management requires recognizing density not as a single variable but as an interaction among density, water quality, feed management, and fish size that produces variable welfare outcomes. Best practice involves dynamic density management — reducing stocking as fish grow and oxygen demand increases, rather than maintaining fixed densities throughout the production cycle. Behavioral monitoring enables early detection of crowding stress before physiological damage accumulates. The business case for welfare-appropriate densities includes reduced disease losses and improved growth efficiency that partially offset the cost of reduced stocking. Certification schemes that mandate maximum density requirements create market incentives for welfare-aligned management.